On Mumsnet.com user Kathan16 said: "I took my 4-yr-old daughter to her friend's birthday party at the wkend and was shocked when all the kids were given Frozen T-shirts from H&M which made it look like Elsa was doing a rude v-sign.

"I wouldn't have minded by some of the kids started copying the pose and soon the room was full of kids flicking the vs to their parents!"